Investigation of transonic buffet using high speed PIV

Ferdinand Schrijer, Roberto Solana Perez, Bas van Oudheusden

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

Transonic buffet of a supercritical airfoil (OAT15A) is investigated by means of schlieren visualization and high speed PIV. The buffet conditions were observed to be strongest at M = 0.7 and a = 3.5o at a frequency of 160 Hz. By means of conditional averaging according to the shock location and movement, the typical buffet cycle is illustrated, confirming observations from literature. In addition, proper orthogonal decomposition is used to further characterize the unsteadiness and it was found that the first 3 modes contain the bulk (> 80%) of the fluctuating energy. Furthermore, through spectral analysis it was found that the typical frequency connected to these modes is equal to the buffet frequency. For mode 4 and higher no peak in the power spectrum is found at the buffet frequency.
Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Experimental Fluid Mechanics (ICEFM 2018), Munich, Germany, July 2-4, 2018
EditorsChristian J. Kähler
PublisherUniversitat der Bundeswehr Munchen
Number of pages6
Publication statusPublished - 2018
EventICEFM 2018: 5th International Conference on Experimental Fluid Mechanics - Munich, Germany
Duration: 2 Jul 20184 Jul 2018
Conference number: 5
https://www.unibw.de/icefm-2018-munich

Conference

ConferenceICEFM 2018: 5th International Conference on Experimental Fluid Mechanics
Abbreviated titleICEFM 2018
CountryGermany
CityMunich
Period2/07/184/07/18
Internet address

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